JP6769610B2 - Grating lid fixing device - Google Patents

Description

In the present invention, a grating lid that is attached to a gutter such as a gutter provided on a side of an indoor or outdoor passage or a crossing groove provided so as to cross the passage is provided on the left and right sides of the groove. The present invention relates to a fixing device for a grating lid for fixing to a pair of left and right lid receiving frames arranged on the side wall of the.

Grating lids covering the upper openings of the gutters such as gutters and crossing grooves are detachably attached to the gutters via a pair of left and right lid receiving frames arranged on the left and right side walls constituting the gutter. Has been done. Here, if the grating lids are simply placed on the left and right lid receiving frames, the grating lids may rattle due to the passage of people or automobiles, causing noise, or the grating lids may be displaced from the adhered position due to the impact of the passage of automobiles. The problem occurs. As a device for preventing the occurrence of such a defect, a fixing device for fixing the grating lid mounted on the lid receiving frame to the lid receiving frame is known.

As a fixing device for the grating lid, for example, the configuration of Patent Document 1 has been proposed. In such a configuration, while bolts are erected on the left and right lid receiving frames, a bottom plate having a bolt insertion hole is arranged at a predetermined position on the lower surface of the graching lid corresponding to the bolt, and the bottom plate is lowered into the bolt insertion hole of the bottom plate. The grating lid is fixed to the lid receiving frame by screwing a nut into the bolt inserted through the lid. Further, on the grating lid, a concave nut accommodating portion is formed by partially missing the bar material constituting the grating lid at the nut mounting portion, so that a cap for closing the nut accommodating portion is attached and detached. Some are installed as possible.

JP-A-2000-45376 (paragraph number 0002, see FIG. 10)

By the way, in the conventional configuration disclosed in Patent Document 1 described above, the nut accommodating portion of the grating lid is formed in a relatively large concave shape into which a box wrench used for rotating the nut can be inserted. Since the heel of the high heel and the tip of the cane are easily fitted to such a nut accommodating portion, a cap is attached as described above, but the cap is free to fit in the nut accommodating portion in order to facilitate attachment and detachment. Since it is only fitted in a fitting shape, there is a risk that it may come off or come off due to the impact of the passage of a car or bicycle. In addition, it was sometimes lost when the cap was removed. Further, as described above, since the nut accommodating portion is formed by partially missing the bar material of the grating lid, there is also a problem that the strength and rigidity are lowered in this portion. Further, since the bar material is partially lost as described above, the appearance of the grating lid is also spoiled.

The present invention can solve the above-mentioned problems, can ensure the safety of passage by not providing the concave nut accommodating portion, and can stably fix the components such as the cap without coming off. It is an object of the present invention to provide a fixing device for a grating lid, which can obtain a state and does not reduce the strength or rigidity of the grating lid and does not spoil the aesthetic appearance.

The present invention is provided on the left and right side walls constituting the groove path so as to face each other along the longitudinal direction of the groove path, and the grazing lid is provided on a pair of left and right lid receiving frames that support the left and right side edges of the grazing lid. In the glazing lid fixing device for fixing the lid, both ends are fixed to the left and right lid receiving frames, and the glazing lid is projected downward between the lid receiving frames and supported by the lid receiving frame. A connecting recess located below the lower surface is provided, and a screw portion of a fixing bolt is screwed into the connecting recess from a predetermined portion of a grazing lid corresponding to the connecting recess of the connecting recess. A fixing plate portion that is projected downward and is located directly above the connecting recess and forms an accommodating gap that can accommodate the head of the fixing bolt with the lower surface of the grazing lid. In addition to being provided, the fixing plate portion is provided with a connecting protrusion formed with an insertion hole through which the screw portion of the fixing bolt can be inserted, and the head is accommodated in the accommodating gap of the connecting protrusion of the grating lid. Further, by screwing the screw portion of the fixing bolt into which the screw portion is inserted into the insertion hole of the connecting protrusion portion to the connecting recess of the connecting protrusion portion, the connecting protrusion portion and the connecting rod portion are formed. It is a fixing device for a glazing lid, characterized in that the glazing lid and the lid receiving frame are fixed via a lid.

Here, as a configuration for screwing the screw portion of the fixing bolt and the connecting recess of the connecting rod portion, a configuration in which the screw portion and the connecting recess are screwed directly or indirectly can be applied. For example, the connecting recess is provided with a female screw hole for screwing with the screw portion, and by screwing the female screw hole and the screw portion, the connecting recess and the screw portion of the fixing bolt are directly screwed together. The configuration is applicable. Alternatively, the connecting recess has a through hole through which the screw portion can be inserted, and the nut is screwed into the screw portion through which the through hole is inserted so that the connecting recess and the fixing bolt are indirectly screwed together. The configuration is also applicable. Further, a nut may be joined to the lower surface of the connecting recess provided with the through hole by welding or the like. Further, as the fixing bolt, a bolt that can be screwed by using a tool that can be inserted between a plurality of main bars constituting the grating lid can be applied. Further, as the lid receiving frame, a frame having a horizontal edge portion on which the left and right side edges of the grating lid are placed can be applied.

In such a configuration, the connecting protrusion arranged below the grating lid and the connecting recess of the connecting rod are fastened by screwing the connecting recess and the fixing bolt. Therefore, the above-described conventional configuration is used. It is not necessary to provide the grating lid with a concave nut accommodating portion as in the above, and safety during walking can be improved. Further, since a cap having a conventional structure to be fitted into the nut accommodating portion is not required, and a connecting protrusion portion and a connecting rod portion, which are constituent members of the present configuration, are fastened by a fixing bolt, the cap or the like can be used. The constituent members do not come off due to the passage of an automobile or the like, and can be stably held in a fixed state. Further, unlike the nut accommodating portion, the main bar of the grating lid is not formed, so that the appearance of the grating lid can be kept stable and the strength and rigidity of the main bar are reduced due to the defect. Does not occur.

Further, since the fixing bolt, the connecting protrusion, and the connecting recess of the connecting rod are arranged below the grating lid as described above, a relatively large fixing bolt can be used. At the same time, the fixing plate portion and the connecting recess of the connecting protrusion can also be formed in a size corresponding to the fixing bolt. Therefore, there is an advantage that the grating lid and the lid receiving frame can be fixed more firmly and stably by applying a large size fixing bolt.

In the above-mentioned fixing device for the grating lid of the present invention, it is formed in a tubular shape that opens in the vertical direction, and is provided so as to be able to be accommodated in the accommodating gap of the connecting protrusion of the grating lid and to be non-tiltable in the accommodating gap. A tubular wall portion formed of an elastic material and forming an internal accommodating area inside which can accommodate the head of a fixing bolt, and an opening formed in the tubular wall portion in the vertical direction, which is a normal state. It is provided with a wall surface opening that is narrower than the outer diameter of the head of the fixing bolt and is widened so that the head can pass through the internal accommodation area due to elastic deformation of the cylinder wall. The fall prevention cylinder is provided by accommodating the head of the fixing bolt in the internal accommodating area thereof and accommodating the head of the fixing bolt in the accommodating gap of the connecting protrusion for fixing. A configuration is proposed in which the head of the bolt is housed in the housing gap and the screw portion is held in the insertion hole.

Here, the fall prevention cylinder may be either a cylindrical one such as a circle or an ellipse, or a polygonal cylinder such as a quadrangle or a pentagon, and has a cylinder wall portion corresponding to the cylinder shape. Further, the fall prevention cylinder can be accommodated in the accommodation gap while maintaining its vertical direction, and can not be tilted in the accommodation gap in a state of being accommodated in the accommodation gap. The fact that the fall prevention cylinder cannot be tilted means that the fall prevention cylinder cannot be tilted and tilted while being accommodated in the accommodation gap. Therefore, the fall prevention cylinder may be able to be slightly tilted so as not to fall while being accommodated in the accommodating gap.

In such a configuration, a fixing bolt in a state in which the screw portion is inserted into the insertion hole of the connecting protrusion and the head is accommodated in the accommodating gap (hereinafter referred to as a mounting state) is placed in the internal accommodating area. It can be held in the mounted state by the fall prevention cylinder that is housed and housed in the housed gap. That is, according to this configuration, even if the fixing bolt can be attached and detached in the attached state, the fixing bolt is accommodated in the accommodating gap as described above. Can be held in the attached state. This is because the fall prevention cylinder cannot be tilted while it is housed in the storage gap, so the head of the fixing bolt whose screw part is inserted into the insertion hole is housed in the internal storage area. This is due to the inability to escape from the containment gap. As described above, this configuration has an excellent effect that the fixing bolt set in the mounted state does not fall during the work at the construction site, and the work is not lost or complicated due to the fall. Can be played. Since it is possible to prevent the fixing bolts from falling, the work load at the construction site can be reduced by setting the fixing bolts together with the fall prevention cylinder at the connecting protrusion of the grating lid before transporting to the construction site. can do.

Further, the fall prevention cylinder can expand the wall surface opening by pressing the wall surface opening against the head of the fixing bolt from the outside thereof, and can accommodate the head in the internal accommodation area. That is, the fall prevention cylinder is pushed into the accommodating gap of the connecting protrusion with the fixing bolt in the mounted state so that the wall surface opening is in contact with the head of the fixing bolt to prevent the fall. The head of the fixing bolt can be accommodated in the internal accommodation area of the cylinder, and the fall prevention cylinder can be accommodated and attached in the accommodation gap. As described above, the fall prevention cylinder can be attached relatively easily, and the above-mentioned fall prevention effect of the fixing bolt can be stably exhibited. Further, since it is possible to attach a fixing bolt to the connecting protrusion provided on the grating lid, after the step of arranging the connecting protrusion on the grating lid in the manufacturing process. , The process of attaching the fixing bolt and the process of attaching the fall prevention cylinder can be carried out. Therefore, there is also an excellent advantage that the above-mentioned arrangement process of the connecting protrusion can be made more efficient and the time and cost of the manufacturing process can be reduced as a whole.

In the above-described grating lid fixing device of the present invention, the cylinder wall portion of the fall prevention cylinder is provided with an inclined edge portion inclined inward on at least one of both side edges of the wall surface opening. The configuration is proposed.

In such a configuration, when the fall prevention cylinder is accommodated in the accommodation gap as described above, the inclined edge portion of the side edge of the wall surface opening is pressed against the head of the fixing bolt, whereby the cylinder wall. Since the portion is easily elastically deformed, the wall surface opening can be expanded relatively easily, and the head can be more easily accommodated in the internal accommodation area. Further, when the head of the fixing bolt is housed in the internal storage area, the tubular wall portion is unlikely to be elastically deformed so as to widen the side opening due to the inwardly inclined inclined edge portion. Can be stably retained within the internal containment area. Therefore, according to this configuration, the fall prevention cylinder can be more easily attached to the accommodating gap of the connecting protrusion where the fixing bolt is attached, and the fall prevention cylinder makes the fixing bolt more stable in the attached state. And can be held, and the fall prevention effect of the fixing bolt can be further improved.

In the above-mentioned fixing device for the grating lid of the present invention, the wall surface opening of the fall prevention cylinder has a narrow opening portion at the upper end thereof, the opening width of which is narrower than the width dimension of the main bar constituting the grating lid. The configuration provided is proposed.

According to such a configuration, when the fall prevention cylinder is tilted while being accommodated in the accommodating gap of the connecting protrusion, it is possible to prevent the main bar from being fitted into the wall surface opening as much as possible. As a result, it is possible to prevent the fall prevention cylinder from tilting due to the main bar being fitted into the wall surface opening. Therefore, according to this configuration, the action and effect of holding the fixing bolt in the mounted state to prevent it from falling can be more stably exhibited.

As described above, the grating lid fixing device of the present invention fastens the connecting protrusion and the connecting rod below the grating lid via fixing bolts, so that the grating lid is left and right. Can be stably fixed to the lid receiving frame. Further, since a nut accommodating portion, a cap, or the like as in the conventional configuration described above is not required, safety during walking can be improved, and the vehicle can be stably held in a fixed state. Further, the appearance of the grating lid can be maintained, and the strength and rigidity of the grating lid do not decrease as in the conventional configuration. Therefore, according to the configuration of the present invention, the grating lid can be stably held for a relatively long period of time in a state of being fixed to the lid receiving frame.

It is a vertical sectional view which shows the construction state of the grating lid 31 by the fixing device 1 which concerns on Example 1. FIG. It is a top view which shows the construction state of the grating lid 31 by the fixing device 1. It is an exploded perspective view of the connecting protrusion 11 and the fixing bolt 5. It is a perspective view which shows the grating lid 31, the connecting protrusion 11, and the fixing bolt 5 in an exploded manner. It is a perspective view which shows the left and right lid receiving frames 41, 41. It is a vertical cross-sectional view which shows the construction state of the grating lid 31 by the fixing device 71 which concerns on Example 2. FIG. It is a partial notch perspective view which shows the construction state of the grating lid 31. It is a partial cut-out perspective view which shows the state which the fixing bolt 5 and the fall prevention cylinder 101 are attached, omitting the grating lid 31. It is a partial cut-out perspective view of the grating lid 31. It is (A) front view, (B) plan view, (C) right side view, and (D) X-ray sectional view which shows the fall prevention cylinder 101. It is (A) the perspective view from the front side and (B) the perspective view from the back side of the fall prevention cylinder 101. It is a vertical cross-sectional view explaining the process of accommodating the fall prevention cylinder 101 in the accommodating gap 89 of the connecting protrusion 81. It is sectional drawing explaining the accommodation process of the fall prevention cylinder 101.

Examples 1 and 2 according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the groove 51 is configured by burying a U-shaped groove block 52 having a substantially U-shaped cross section at a predetermined depth position on the ground in a row. A pair of left and right lid receiving frames 41, 41 are arranged along the longitudinal direction of the groove 51 on the upper portions of the left and right side walls 53, 53 of the U-shaped groove block 52 constituting the groove 51. (See FIG. 5). The lid receiving frame 41 includes a horizontal edge portion 42 on which the left and right side edges of the grating lid 31, which will be described later are mounted and supported, and a vertical edge portion 43 rising from the outer end of the horizontal edge portion 42, and has a substantially L cross section. An angle member made of steel in the shape is cut into a predetermined length corresponding to the length of several U-shaped groove blocks 52. Here, the height dimension of the vertical edge portion 43 substantially matches the thickness of the grating lid 31. Further, paving materials 60 such as tiles are laid on both sides of the groove passage 51, and the upper opening of the groove passage 51 is partitioned by the vertical edge portions 43 of the left and right lid receiving frames 41 and 41.

In addition to the construction using the U-shaped groove block 52 described above, the groove 51 may be constructed with a substantially U-shaped cross section by placing concrete on the formwork assembled at the construction site. Further, the lid receiving frame 41 may be a strip material made of steel, which is bent into an L-shaped cross section, in addition to the above-mentioned angle material. Further, the lid receiving frame 41 may use a metal material such as stainless steel in addition to steel.

Further, as shown in FIG. 2, the grating lids 31 supported by the left and right lid receiving frames 41 and 41 are orthogonal to a plurality of main bars 32 arranged in parallel in the longitudinal direction of the groove path 51 at predetermined intervals and the main bars 32. It is a stainless steel grating having an appropriate number of crossbars 33 and sidebars 34 arranged at both left and right ends of each main bar 32 along the crossbar 33. As shown in FIG. 1, the grating lid 31 has its left and right side edges mounted on the horizontal edge portions 42, 42 of the lid receiving frames 41, 41, so that the vertical edge portions 43 of the lid receiving frames 41, 41 are mounted. , 43 covers the upper opening of the groove 51 partitioned by 43 so that water can pass through.

Here, the grating lid 31 of this embodiment is arranged along a direction in which the main bar 32 is substantially orthogonal to the longitudinal direction of the groove path 51 (the width direction of the groove path 51). The distance between the adjacent main bars 32 is set to at least a predetermined distance (for example, about 9 mm) in which the heel of the high heel or the tip of the cane is difficult to fit.

Next, the grating lid fixing device 1 according to the present invention will be described in detail.
As shown in FIG. 1, the fixing device 1 of the first embodiment includes a connecting rod 21 for connecting the left and right lid receiving frames 41 and 41, and a connecting protrusion 11 protruding downward from the lower surface of the grating lid 31. The grating lid 31 is fixed to the lid receiving frames 41 and 41 by screwing the connecting protrusion 11 and the connecting rod 21 with a fixing bolt 5.

The connecting protrusion 11 described above is arranged by being joined to the lower surface of the grating lid 31 by welding. Here, as shown in FIG. 2, two connecting protrusions 11 are joined to both ends of the grating lid 31 at predetermined intervals in the width direction, and a total of four connecting protrusions 11 are connected to the grating lid 31. The protrusion 11 is arranged. As shown in FIGS. 3 and 4, the connecting protrusion 11 of the first embodiment is formed by bending a strip material made of stainless steel into a substantially U-shaped cross section, and the fixing plate portion 12 is formed along a substantially horizontal direction. And the side portions 13 and 13 erected upward from both side edges of the fixing plate portion 12. Then, the upper end portions of the side portions 13 and 13 of the connecting protrusion 11 are joined to the lower surface of the grating lid 31 (the lower surface of the main bar 32) by welding.

An insertion hole 14 through which the screw portion 6 of the fixing bolt 5 can be inserted is formed in the fixing plate portion 12 of each connecting protrusion 11. Here, the insertion hole 14 is provided so as to be located directly below the main bars 32, 32 adjacent to the grating lid 31. In other words, each connecting protrusion 11 is joined to a predetermined portion of the grating lid 31 so that the respective insertion holes 14 are located directly below the adjacent main bars 32 and 32.

The height of the connecting protrusion 11 from the upper surface of the fixing plate portion 12 to the upper ends of the side portions 13 and 13 is set to a predetermined dimension higher than the height dimension of the head 7 of the fixing bolt 5. The head 7 of the fixing bolt 5 can be accommodated in the gap formed between the lower surface and the fixing plate portion 12 in a state of being joined to the lower surface of the grating lid 31 as described above (see FIG. 1). The gap between the fixing plate portion 12 and the lower surface of the grating lid 31 is the accommodating gap 19 according to the present invention. Further, the distance between the side portions 13 and 13 on both sides is set to a predetermined size larger than the outer diameter of the head 7 so that the head 7 of the fixing bolt 5 can be rotated in the accommodating gap 19.

In the first embodiment, the fixing bolt 5 in which the screw portion 6 of the fixing bolt 5 is inserted into the insertion hole 14 of the fixing plate portion 12 and the head 7 is accommodated in the accommodating gap 19. The height dimension of the accommodating gap 19 is set so that the screw portion 6 cannot escape from the insertion hole 14 in a state where the screw portion 6 is mounted on the connecting protrusion 11 (hereinafter referred to as a mounted state). Therefore, in the configuration of the first embodiment, as shown in FIG. 4, the connecting protrusion 11 has the screw portion 6 of the fixing bolt 5 inserted into the insertion hole 14 from above, and the lower surface of the grating lid 31 is inserted. Will be welded to. Then, the fixing bolt 5 is held in the mounted state at the connecting protrusion 11 arranged by welding on the grating lid 31.

Further, in the first embodiment, since the grating lid 31 and the connecting protrusion 11 are made of stainless steel and have high corrosion resistance, the hot-dip galvanizing treatment is not performed as in the lid receiving frames 41 and 41 described later. Therefore, the fixing bolt 5 is easily rotated while the screw portion 6 is inserted into the insertion hole 14.

As shown in FIG. 3, the above-mentioned fixing bolt 5 includes a head 7 provided with a hexagonal hole (not shown) into which a hexagon wrench can be inserted, and a screw portion 6 protruding from the lower end of the head 7. It is a so-called hexagon socket head cap screw. Therefore, the fixing bolt 5 can be rotated by a hexagon wrench that can be inserted into the gap between the main bars 32 adjacent to the grating lid 31 and can be rotated in the inserted state. In this embodiment, a washer-embedded hexagon socket head cap screw provided with a disk-shaped washer (not shown) is used.

On the other hand, as shown in FIG. 5, the delivery rod portion 21 constituting the fixing device 1 described above is arranged along the width direction of the groove 51 so as to pass the pair of left and right lid receiving frames 41, 41. , Both lid receiving frames 41, 41 are connected. The delivery rod portion 21 is formed by bending a strip material made of steel, and has joint end portions 22 and 22 welded to the horizontal edge portion 42 of the lid receiving frame 41 at both ends. At the same time, a connecting recess 23 is provided between the joint ends 22 and 22 on both sides. The connecting recesses 23 are fixed receivers that extend downward from the inner ends of the joint ends 22 and 22 on both sides and the hanging portions 23b and 23b that extend horizontally from the lower ends of the hanging portions 23b and 23b on both sides. It is composed of a part 23a. The connecting recess 23 is set so that the dimension along the width direction of the groove 51 is slightly shorter than the distance between the side walls 53 and 53 of the U-shaped groove block 52. In the delivery rod portion 21 of the first embodiment, the joint end portions 22 and 22 on both sides are welded to the lower surfaces of the horizontal edge portions 42 and 42 of the lid receiving frames 41 and 41, and the connecting recesses 23 are the lid receiving frames 41 and 41. Since the lid receiving frames 41 and 41 are arranged in the groove path 51, the connecting recess 23 (fixed receiving portion 23a) fits inside the groove path 51.

In the delivery rod portion 21, the joint ends 22 and 22 at both ends are welded to the left and right lid receiving frames 41 and 41 to determine the distance between the lid receiving frames 41 and 41. Then, the delivery rod portion 21 arranges the distance between the left and right lid receiving frames 41, 41 on the side walls 53, 53 of the U-shaped groove block 52 in which the lid receiving frames 41, 41 form the groove path 51. It is stipulated in. As a result, the left and right lid receiving frames 41, 41 connected by the delivery rod portion 21 can be easily positioned on the side walls 53, 53 of the groove path 51 at the construction site.

A plurality of the above-mentioned connecting rods 21 are arranged on the lid receiving frames 41 and 41 so as to be located directly below the two connecting protrusions 11 and 11 arranged side by side at both ends of the grating lid 31 in the longitudinal direction. (See Figures 1 and 2). Then, the connecting recess 23 of the delivery rod portion 21 is arranged in the grating lid 31 with the fixed receiving portion 23a supported by the left and right lid receiving frames 41 and 41 as described above. It is located directly below the fixing plate portion 12 of the connecting protrusion 11, and substantially abuts on the upper surface of the fixing plate portion 12. That is, the connecting recess 23 of the connecting rod 21 is set so that the distance from the lower surface of the grating lid 31 supported by the lid receiving frames 41 and 41 is substantially the same as the height dimension of the connecting protrusion 11. There is. In other words, the connecting recess 23 is provided so that the connecting protrusion 11 can be accommodated in the gap with the lower surface of the grating lid 31.

Further, in the delivery rod portion 21, screw holes 26, 26 for screwing the screw portion 6 of the fixing bolt 5 described above are formed in the fixing receiving portion 23a of the connecting recess 23. The screw holes 26, 26 are formed at predetermined portions corresponding to the insertion holes 14, 14 of the two connecting protrusions 11, 11 arranged side by side in the width direction of the grating lid 31, and each connecting protrusion is formed. By arranging the portions 11 and 11 directly above the fixed receiving portion 23a, the portions 11 and 11 overlap the insertion holes 14 and 14 vertically (see FIG. 1).

In the first embodiment, since the lid receiving frames 41, 41 and the delivery rod portion 21 described above are molded from steel, they are delivered in order to prevent corrosion and improve the aesthetic appearance of the product. After both the joint ends 22 and 22 of the steel portion 21 are welded to the horizontal edge portions 42 and 42 of the left and right lid receiving frames 41 and 41, they are immersed in hot-dip zinc and subjected to hot-dip galvanizing treatment. Since the hot-dip galvanized zinc adheres to the screw holes 26 and 26 of the delivery rod portion 21 by the hot-dip galvanizing treatment, it is fixed by inserting a tap attached to an electric tool (not shown). Unnecessary plating can be removed.

Next, a mode in which the grating lid 31 is fixed to the left and right lid receiving frames 41 and 41 by the fixing device 1 of the first embodiment described above will be described.
As described above, the left and right lid receiving frames 41 and 41 are mounted on the left and right side walls 53 and 53 of the U-shaped groove block 52 constituting the groove path 51, respectively, and the U-shaped groove block is mounted by a fixing means (not shown). It is fixed and attached to 52 (see FIG. 5). Here, since the left and right lid receiving frames 41 and 41 are connected by the delivery rods 21 and held at intervals of being mounted on the side walls 53 and 53, they can be easily mounted on the side walls 53 and 53. It can be positioned and the workability of construction work can be improved.

When the lid receiving frames 41, 41 are arranged on the side walls 53, 53 of the groove path 51 in this way, the left and right side edges of the grating lid 31 are mounted on the horizontal edge portions 42, 42 of the lid receiving frames 41, 41. Then, the grating lid 31 is supported by the lid receiving frames 41 and 41 (see FIG. 2). Here, the grating lid 31 is mounted on the lid receiving frames 41 and 41 by adjusting the position so that the insertion holes 14 of the connecting protrusions 11 overlap each screw holes 26 of the connecting rods 21 at the top and bottom. .. As a result, the tip of the screw portion 6 of the fixing bolt 5 inserted into the insertion hole 14 of each connecting protrusion 11 comes into contact with each screw hole 26 of the delivery rod portion 21. When the grating lid 31 is arranged in this way, each fixing bolt 5 is rotated by using a hexagon wrench (not shown). Here, since the insertion holes 14 of the connecting protrusions 11 are provided so as to be located between the adjacent main bars 32 and 32 as described above, the screw portion 6 is inserted into the insertion holes 14. The fixing bolt 5 can be rotated by a hexagon wrench with a gap between the adjacent main bars 32 and 32 inserted. By rotating the fixing bolt 5 with the hexagon wrench, the screw portion 6 of the fixing bolt 5 is screwed into the screw hole 26 of the delivery rod portion 21, and the fixing bolt 5 is screwed into the delivery rod portion 21. It is screwed into the connecting recess 23. As a result, the connecting protrusion 11 and the connecting recess 23 of the connecting rod 21 can be fastened via the fixing bolt 5 (see FIG. 1). Then, the grating lid 31 can be fixed to the left and right lid receiving frames 41 and 41 by fastening the connecting protrusions 11 and the connecting rods 21.

In the fixing device 1 of the above-described first embodiment, the connecting protrusion 11 arranged below the grating lid 31 and the connecting recess 23 of the connecting rod 21 are fastened by the fixing bolt 5. The fixing bolt 5 can be rotated by a hexagon wrench inserted into the gap of the main bar 32 of the grating lid 31. Therefore, unlike the conventional configuration described above, it is not necessary to cut the main bar of the grating lid to form the nut accommodating portion, and further, there is no need for a cap to be fitted into the nut accommodating portion. Therefore, according to the configuration of the first embodiment, the safety during walking can be improved, and the components such as the cap do not come off due to the passage of an automobile or the like, and the grating lid 31 is fixed. Can be held stably at. Further, in the configuration of the first embodiment, since the main bar and the like are not cut as in the conventional configuration, the appearance of the grating lid 31 can be kept stable, and the strength and rigidity of the main bar are reduced due to the cutting. Does not occur. Further, as the fixing bolt 5, a relatively large one can be used as long as it can be rotated by the hexagon wrench, and the fixing protrusion 11 and the fixing receiving portion 23a of the connecting recess 23 are the fixing bolts 5. Can be formed according to the size of. As a result, the fixing plate portion 12 of the connecting protrusion 11 and the fixing receiving portion 23a of the connecting recess 23 can be fastened with sufficient strength, so that the grating lid 31 and the lid receiving frames 41 and 41 are fixed more firmly and stably. It can be held in the fixed state for a relatively long period of time.

Further, in the configuration of the first embodiment, since the grating lid 31 and the connecting protrusion 11 are formed of stainless steel and do not require rust prevention treatment such as hot dip galvanizing treatment, the connecting protrusion The connecting protrusion 11 can be welded to the grating lid 31 in a state where the screw portion 6 of the fixing bolt 5 is inserted into the insertion hole 14 of 11. As a result, the fixing bolt 5 is attached to the grating lid 31 so as not to escape in the above-mentioned mounting state (the head 7 is accommodated in the accommodating gap 19 and the screw portion 6 is inserted into the insertion hole 14). According to this configuration, it is not necessary to put the fixing bolt 5 in the mounted state during the construction work, and the fixing bolt 5 is dropped during the transportation work to the construction site or the construction work. It will not be lost.

Further, the connecting rod portion 21 provided with the connecting recess 23 for screwing the fixing bolt 5 connects the left and right lid receiving frames 41 and 41 at a predetermined interval, and the interval is the side wall of the groove path 51. Since it is determined according to the intervals of 53 and 53, it is possible to easily position the left and right lid receiving frames 41 and 41 in the width direction at the time of construction. Further, the grating lid 31 has horizontal edges of the lid receiving frames 41 and 41 so that the screw portion 6 of the fixing bolt 5 attached to each connecting protrusion 11 is aligned with the screw hole 26 of the delivery rod portion 21. By mounting on 42, 42, it can be easily positioned. As described above, since the positioning work of the lid receiving frames 41 and 41 and the grating lid 31 can be easily performed, there is an advantage that the workability of the construction work can be improved.

In the second embodiment, the grating lid 31 and the connecting protrusion 81 are made of steel, and as shown in FIGS. 6 and 7, the fixing device 71 has a fixing bolt attached to the connecting protrusion 81. It is provided with a fall prevention cylinder 101 that holds the 5 in the mounted state. Then, the connecting protrusion 81 and the connecting rod 91 form a form corresponding to the fall prevention cylinder 101. In the second embodiment, since the configurations other than these are the same as those in the first embodiment described above, the same reference numerals are given to the same components, and the description thereof is omitted as appropriate.

The connecting protrusion 81 is formed by bending a strip material made of steel into a substantially U-shaped cross section, and as shown in FIG. 8, the connecting protrusion 81 is fixed to the fixing plate portion 82 along a substantially horizontal direction. It is composed of side portions 83 and 83 that are erected upward from both side edges of the plate portion 82. In the second embodiment, the height dimensions of the side portions 83 and 83 are higher than those in the first embodiment described above, and the accommodation is formed between the fixing plate portion 82 and the lower surface of the grating lid 31. The gap 89 is higher than that of Example 1 described above. Here, the height dimension of the accommodating gap 89 is set so that the fixing bolt 5 can be mounted in the above mounted state with the connecting protrusion 81 arranged on the lower surface of the grating lid 31. It is also possible to escape the fixing bolt 5 from the mounted state.

The connecting protrusion 81 is provided with an insertion hole 84 in the fixing plate portion 82 through which the screw portion 6 of the fixing bolt 5 can be inserted, as in the case of the first embodiment described above (see FIG. 9). Then, four connecting protrusions 81 are joined to the grating lid 31 as in the above-described first embodiment, and the fixing bolts 5 attached to the respective connecting protrusions 81 are attached to the above-mentioned embodiment 1. Similarly, the rotation can be operated by a hexagon wrench inserted through the gaps between the main bars 32 and 32.

The grating lid 31 is formed of steel and includes a main bar 32, a crossbar 33, and a side bar 34, as in the first embodiment described above. Then, as shown in FIG. 9, the above-mentioned connecting protrusion 81 is joined to the lower surface of the grating lid 31 by welding, and after welding, hot-dip galvanizing treatment is performed in the same manner as the above-mentioned lid receiving frame 41 of Example 1. This hot-dip galvanizing treatment is carried out in a state where the fixing bolt 5 is not attached. If the hot-dip galvanizing treatment is performed with the fixing bolt 5 attached to the connecting protrusion 81, the hot-dip galvanized zinc adheres to the screw portion 6 of the fixing bolt 5 and the screw thread of the screw portion 6 is used. The fixing bolt 5 cannot be rotated due to problems such as being unable to be performed or the fixing bolt 5 being fixed to the connecting protrusion 81 due to the molten zinc.

Further, as shown in FIGS. 6 to 8, the fixing device 71 of the second embodiment is a fall prevention cylinder for holding the fixing bolt 5 attached to the connecting protrusion 81 joined to the grating lid 31 in the attached state. It has a body 101. Here, since the grating lid 31 and the connecting protrusion 81 are subjected to a hot-dip galvanizing treatment after welding as described above, the fixing bolt 5 is attached to the connecting protrusion 81 after this treatment. Therefore, the fixing bolt 5 can be attached and detached, and the above-mentioned fall prevention cylinder 101 is used to hold the fixing bolt 5 in the mounted state.

As shown in FIGS. 10 and 11, the fall prevention cylinder 101 has a tubular shape having a substantially quadrangular cross section that opens in the vertical direction, and the tubular wall portion 102 formed in the tubular shape and the tubular wall portion. The 102 is provided with a wall surface opening 103 having an opening formed in the vertical direction. Here, the tubular wall portion 102 is formed into the above-mentioned quadrangular tubular shape by bending an ultra-thin stainless steel strip for a spring (for example, SUS304-CSP), and is used for fixing in the enclosed internal gap. The head portion 7 of the bolt 5 can be loosely fitted. The internal gap of the tubular wall portion 102 is the internal accommodation area 109 according to the present invention.

The tubular wall portion 102 is composed of a substantially rectangular side surface portion 105 that constitutes each of the three surfaces in the circumferential direction and two inclined edge portions 106 that form the remaining one surface, and these are coupled in the circumferential direction. It becomes. The two inclined edge portions 106 and 106 are separated on the left and right sides, and the wall surface opening 103 is formed between them, and the two inclined edge portions 106 and 106 are inclined inward toward the wall surface opening 103. Further, in this embodiment, the inclined edge portions 106 and 106 are each formed in an inverted L shape, and are provided so as to face each other on the left and right sides of the wall surface opening 103. As a result, the wall surface opening 103 is formed by vertically connecting a narrow opening 103b having a narrow opening width and a wide opening 103a having a wide opening. Here, the opening width (width in the left-right lateral direction) of the lower widening opening 103a is normally narrower than the outer diameter of the head 7 of the fixing bolt 5, and the elasticity of the cylinder wall 102. It has a predetermined width that can be expanded so as to pass through the head 7 by deformation. The height dimension of the widening opening 103a is higher than the height dimension of the head 7 of the fixing bolt 5 (see FIGS. 8 and 12) so that the head 7 can pass through the head 7 with a margin. It has become. On the other hand, the opening width of the narrow opening portion 103b is normally narrower than that of the widening opening portion 103a and narrower than the width of the main bar 32 of the grating lid 31, due to the elastic deformation of the tubular wall portion 102. Even if it is expanded, it is difficult to pass through the head 7. The vertical dimension of the narrow double-mouthed portion 103b is shorter than that of the widened-mouthed portion 103a.

In such a fall prevention cylinder 101, since the inclined edge portions 106 and 106 are inclined inward as described above, the tubular wall portion 102 is easily elastically deformed by pressing from the outside to the inside. The wall surface opening 103 is easy to expand. However, conversely, even when pressed from the inside, the tubular wall portion 102 is unlikely to be elastically deformed so as to expand the wall surface opening 103. Therefore, the head 7 of the fixing bolt 5 is easily accommodated in the internal accommodating area 109 via the wall surface opening 103, and after accommodating, the head 7 is difficult to escape through the wall surface opening 103.

Further, the fall prevention cylinder 101 can enter and exit the accommodation gap 89 formed by the fixing plate portion 82 of the connecting protrusion 81 and the lower surface of the grating lid 31 while maintaining the vertical direction, and the accommodation gap 101. It is impossible to tilt while being housed in 89. That is, the fall prevention cylinder 101 is set so that the height dimension of the cylinder wall portion 102 is slightly lower than the height dimension of the accommodating gap 89 and cannot be entered or exited in an inclined state.

Further, in the fall prevention cylinder 101 of the second embodiment, the window portion 108 is formed with an opening in the side surface portion 105 constituting the cylinder wall portion 102. The window portion 108 is formed so as to open from the lower end of the tubular wall portion 102 at a position higher than the height dimension of the head portion 7 of the fixing bolt 5, and the fixing bolt 5 is opened as described later. The fixing bolt 5 is opened on the upper side of the head 7 in a state of being screwed into the connecting recess 93 of the delivery rod portion 91.

The above-mentioned fall prevention cylinder 101 is placed in the accommodating gap 89 of the connecting protrusion 81 as shown in FIGS. 12 and 13 after the fixing bolt 5 is attached to the connecting protrusion 81 to bring it into the above-mentioned mounting state. It is accommodated and holds the fixing bolt 5 in a mounted state. More specifically, as shown in FIGS. 12 (A) and 13 (A), with the head 7 of the fixing bolt 5 housed in the housing gap 89, the inclined edge portions 106 on both sides of the wall surface opening 103, The 106 is pressed against the head 7, and the fall prevention cylinder 101 is pushed into the accommodation gap 89. As a result, as shown in FIGS. 12B and 13B, the tubular wall portion 102 is elastically deformed to widen the widening opening portion 103a of the wall surface opening 103, and FIGS. 12C and 13B are formed. As shown in (C), the head portion 7 of the fixing bolt 5 can be accommodated in the internal accommodating area 109 via the widening opening portion 103a. Along with this, the fall prevention cylinder 101 is accommodated in the accommodating gap 89. Here, by keeping the fall prevention cylinder 101 in the vertical direction, the fall prevention cylinder 101 is accommodated in the accommodating gap 89 and is kept in the accommodated state without being tilted. When the fall prevention cylinder 101 is accommodated in the accommodation gap 89 in this way, the fall prevention cylinder 101 cannot be tilted, so that the head 7 is accommodated in the internal accommodation area 109 of the fall prevention cylinder 101. As it is, the screw portion 6 of the fixing bolt 5 cannot be removed from the insertion hole 84, and the fixing bolt 5 and the fall prevention cylinder 101 cannot be escaped from the accommodating gap 89. Further, since it is extremely difficult to escape the head 7 of the fixing bolt 5 from the internal accommodation area 109 of the fall prevention cylinder 101 as described above, only the fall prevention cylinder 101 should be escaped from the accommodation gap 89. I can't do that. Therefore, by accommodating the fall prevention cylinder 101 in the accommodating gap 89, the fixing bolt 5 can be held in a state of being attached to the connecting protrusion 81.

The fall prevention cylinder 101 is accommodated in the accommodating gap 89 of the connecting protrusion 81, so that the head 7 of the fixing bolt 5 is loosely fitted in the internal accommodating area 109 and the screw portion 6 is inserted into the hole. It is held in the mounted state inserted through the 84. Therefore, the fixing bolt 5 is rotated by a hexagon wrench (not shown) through which the gap between the main bars 32 of the grating lid 31 is inserted.

On the other hand, as shown in FIG. 7, the delivery rod portion 91 is arranged so as to be spread over the left and right lid receiving frames 41 and 41, and the joint end portions 92 and 92 at both ends and the joint end portions 92 and 92. It is composed of a connecting recess 93 between the joint ends 92 and 92. A plurality of connecting rods 91 are arranged on the lid receiving frames 41 and 41 so as to be located directly below the two connecting protrusions 81 and 81 arranged side by side at both ends of the grating lid 31 in the longitudinal direction. Will be done. In the transfer rod portion 91 of the second embodiment, the connecting recess 93 is composed of the fixed receiving portion 93a and the hanging portions 93b and 93b, and the height dimension of the hanging portion 93b is higher than that of the above-described first embodiment. The distance between the lower surface of the grating lid 31 supported by the lid receiving frames 41 and 41 and the fixed receiving portion 93a is set to be substantially the same as the height dimension of the connecting protrusion 81. As a result, with the grating lid 31 supported by the lid receiving frames 41 and 41, the fixing plate portion 82 of each connecting protrusion 81 is positioned directly above the fixed receiving portion 93a of the connecting recess 93 and substantially abuts (FIG. 6).

Similar to the first embodiment described above, the connecting rod 91 is formed with screw holes 96, 96 in the fixing receiving portion 93a to be screwed with the screw portion 6 of the fixing bolt 5 (see FIG. 6). ). Further, the delivery rod portion 91 is formed by bending a steel strip material, and after welding to the left and right lid receiving frames 41 and 41, a hot-dip galvanizing treatment is performed in the same manner as in Example 1 described above. Is carried out.

Even in the fixing device 71 of the second embodiment, the grating lid 31 can be fixed to the left and right lid receiving frames 41 and 41 in the same manner as in the first embodiment described above. That is, the left and right lid receiving frames 41, 41 are mounted and fixed on the left and right side walls 53, 53 of the groove path 51, and the left and right side edges of the grating lid 31 are horizontal edges of the lid receiving frames 41, 41. It is mounted on 42, 42 and supported, and the position is adjusted so that the insertion hole 84 of each connecting protrusion 81 overlaps each screw hole 96 of the transmission rod 91 in the vertical direction. Then, by using a hexagon wrench (not shown) to rotate the fixing bolts 5 attached to the connecting protrusions 81, the screw portion 6 of the fixing bolt 5 is made to be connected to the screw hole 96 of the delivery rod portion 91. It is screwed, and the fixing bolt 5 is screwed into the connecting recess 93 of the delivery rod portion 91. As a result, the connecting protrusion 81 and the connecting rod 91 are fastened via the fixing bolt 5, and the grating lid 31 can be fixed to the lid receiving frames 41 and 41.

In the configuration of the second embodiment described above, since the grating lid 31 and the connecting protrusion 81 are formed of steel and the two are subjected to a rust preventive treatment such as hot dip galvanizing after welding, the rust preventive treatment is performed. After that, the fixing bolt 5 attached to the connecting protrusion 81 was inserted into the insertion hole 84 by the fall prevention cylinder 101 in the attached state (the head 7 was accommodated in the accommodating gap 89 and the screw portion 6 was inserted into the insertion hole 84. It is to be held in the state). As described above, in this configuration, after the grating lid 31 and the connecting protrusion 81 are joined, the fixing bolt 5 can be attached to the accommodating gap 89, and the fixing bolt 5 can be attached only by attaching the fixing bolt 5. Although the bolt 5 is easily disengaged, the fixing bolt 5 can be held in the mounted state by further mounting the fall prevention cylinder 101 as described above. Therefore, even in the configuration of the second embodiment, as in the first embodiment described above, it is not necessary to put the fixing bolt 5 in the mounted state at the time of the construction work, and the transportation to the construction site is carried out. During the work or the construction work, the fixing bolt 5 is not dropped and lost.

Further, since the fall prevention cylinder 101 can rotate in a state of being accommodated in the accommodating gap 89, the wall surface opening 103 may be oriented in the width direction of the grating lid 31. Even when rotated in this way, the fall prevention cylinder 101 is provided with a narrow opening 103b having an opening width narrower than the width of the main bar 32 at the upper end of the wall opening 103. Therefore, it is possible to prevent the lower end of the main bar 32 from being fitted into the wall surface opening 103 as much as possible. Therefore, according to this configuration, it is possible to prevent the fall prevention cylinder 101 from tilting by fitting the main bar 32 into the wall surface opening 103 of the fall prevention cylinder 101, and the fixing bolt 5 The above-mentioned action and effect of holding the body in the mounted state is more stably exhibited.

Further, since the fall prevention cylinder 101 of the second embodiment is provided with the window portion 108 on the side surface portion 105, the fall prevention cylinder 101 flows into the internal accommodation area 109 of the fall prevention cylinder 101 with the grating lid 31 fixed. The sand, dust, and the like can be discharged through the window portion 108. As a result, when removing the fixing bolt 5 for inspection or the like, the hexagon wrench can be easily fitted to the head 7 of the fixing bolt 5, and the workability of the removing work can be improved.

Further, since the fixing device 71 of the second embodiment has the same configuration as that of the first embodiment except that the fall prevention cylinder 101 is provided, other actions of the fall prevention cylinder 101. As for the effect, the same action and effect as in Example 1 are obtained.

The present invention is not limited to the above-described first and second embodiments, and configurations other than the above-described embodiments can be appropriately modified and implemented within the scope of the gist of the present invention.

For example, even if the grating lid and the connecting protrusion are formed of steel, the fall prevention cylinder may be attached as in the second embodiment. That is, the configuration of Example 2 is suitable not only for a configuration formed of a material to be rust-proofed such as steel, but also a material that does not require the rust-preventive treatment (for example, stainless steel, aluminum alloy). It can be applied even if it is made of steel, plastic, etc., and has the same effect.

Similarly, in the above-described first and second embodiments, the lid receiving frame 41 and the connecting rods 21 and 91 are formed of steel, but the present invention is not limited to this, and stainless steel, aluminum alloy, or the like is used. It may be composed of other metal materials. In the case of a structure in which the lid receiving frame and the connecting rod portion are formed of a material that does not require rust prevention treatment, such as stainless steel or aluminum alloy, the lid receiving frame and the connecting rod portion are treated to prevent rust. The step of performing can be omitted.

Further, in the above-described second embodiment, the fall prevention cylinder is a quadrangular cylinder, but the present invention is not limited to this, and a polygonal cylinder such as a triangle or a pentagon, or a cylinder such as a circle or an ellipse is used. It may be in the shape.

1,71 Fixing device (Grating lid fixing device)
5 Fixing bolt 6 Screw part 7 Head 11,81 Connecting protrusion 12,82 Fixing plate part 14,84 Insertion hole 19,89 Storage gap 21,91 Difference rod 23,93 Connecting recess 31 Grating lid 32 Main bar 41 Lid receiving frame 51 Groove road 53 Side wall 101 Fall prevention cylinder 102 Cylinder wall 103 Wall opening 103b Narrow mouth 106 Grating edge 109 Internal accommodation area

Claims (4)

To fix the grating lid to a pair of left and right lid receiving frames that are arranged so as to face each other along the longitudinal direction of the groove on the left and right side walls constituting the grating lid and support the left and right side edges of the grating lid. In the grating lid fixing device of
Both ends are fixed to the left and right lid receiving frames, and a connecting recess that is projected downward between the lid receiving frames and is located below the lower surface of the grating lid supported by the lid receiving frame is provided. A transfer rod portion into which the screw portion of the fixing bolt is screwed into the connecting recess, and
It is projected downward from a predetermined portion of the grating lid corresponding to the connecting recess of the delivery rod portion, is located directly above the connecting recess, and is used for fixing the grating lid between the lower surface and the lower surface of the grating lid. A fixing plate portion that forms an accommodating gap that can accommodate the head of the bolt is provided, and the fixing plate portion is provided with a connecting protrusion that is formed with an insertion hole through which the screw portion of the fixing bolt can be inserted.
The screw portion of the fixing bolt in which the head is accommodated in the accommodating gap of the connecting protrusion of the grating lid and the screw portion is inserted into the insertion hole of the connecting protrusion is inserted into the connecting recess of the delivery rod portion. A grating lid fixing device, characterized in that the grating lid and the lid receiving frame are fixed via the connecting protrusion portion and the delivery bolt portion by screwing with the grating lid. It is formed in a tubular shape that opens in the vertical direction, can be accommodated in the accommodating gap of the connecting protrusion of the grating lid, and is provided so as not to tilt in the accommodating gap.
A tubular wall part formed of an elastic material and forming an internal storage area inside which can accommodate the head of a fixing bolt,
An opening is formed in the tubular wall portion in the vertical direction, the width is normally narrower than the outer diameter of the head of the fixing bolt, and the head is brought into the internal accommodation area by elastic deformation of the tubular wall portion. A fall prevention cylinder provided with a wall opening that is widened so that it can pass through,
In the fall prevention cylinder, the head of the fixing bolt is accommodated in the internal accommodating area, and the head of the fixing bolt is accommodated in the accommodating gap of the connecting protrusion. The grating lid fixing device according to claim 1, wherein the grating lid is accommodated in the accommodating gap and the screw portion is held in a state of being inserted into the insertion hole. The grating lid according to claim 2, wherein the cylinder wall portion of the fall prevention cylinder is provided with an inclined edge portion inclined inward of the cylinder at at least one of both side edges of the wall surface opening. Fixing device. 2. The wall opening of the fall prevention cylinder is provided with a narrow opening having an opening width narrower than the width of the main bar constituting the grating lid at the upper end thereof. 3. The grating lid fixing device according to 3.

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